In a right triangle, angle $A$ is $35°$ and the side opposite angle $A$ is $7$ units long. The hypotenuse is $12$ units long. Solve for angle $x$ (the other non-right angle). Round your answer to the nearest tenth of a degree, if necessary.

• A. $65.0°$
• B. $45.0°$
• C. $90.0°$
• D. $55.0°$

Answer: (D)

Verified step by step guidance

1. Identify the given information: angle A = 35° and the hypotenuse = 12 units, with the side opposite angle A being 7 units.
2. Recall that in a right triangle, the sum of the two non-right angles is 90°, so angle x + angle A = 90°.
3. Use the fact that angle A is 35°, so angle x = 90° - 35°.
4. Calculate angle x by subtracting 35° from 90°, which gives the measure of the other non-right angle.
5. Round the result to the nearest tenth of a degree if necessary to find the final value of angle x.